Google "contract law" "corporate law" "statute of frauds" "agency law" "workman's compensation" "contractor license laws" "workman and material liens".

State statutes often dictate non-accrual status, so be careful assuming you'll be collecting interest in arrears.

[Missouri Statute 441.740.1]Renter's insurance is requiredInclude a "Break-Lease clause."

Here is the link:http://www.leg.state.fl.us/statutes/index.cfm?

Yes, it looks like "source of income" is in a few state statutes.  

Also, it is up to you, but if the suggestion comes up, I wouldn't accept partial payment, even though it appears Wisconsin Statues appear to allow for this and still continue with eviction (Wis Statute Sec 799.40(1m) - https://docs.legis.wisconsin.gov/statutes/statutes/799/40/1m) (contact a lawyer, I am not a lawyer and none of this is legal advise). 

If not, they will dismiss your case.In short it all depends on your state statute.

My father-in-law is an attorney and he writes nasty letters for us any time something like this comes up citing credit statutes.

Do you have a FL general statute reference?

You have to read the statutes that established "MUNICIPAL CLAIM AND TAX LIEN LAW" and in there you can read about rights of redemption.http://www.legis.state.pa.us/WU01/LI/LI/US/PDF/1923/0/0153..PDFOn page 19 of that document is where the "free and clear" sale is given.